I believe Gιygαs is correct.
Look here for something possibly helpful though:
http://www.lucasforums.com/showthread.php?t=152585
I haven't used Preppie, so I can't speak to its efficacy.

However, if your system can handle running tsl in windowed mode, or you can alt-tab successfully in and out (less likely ;) ), you can use the whereami armband or the Hak Pad with the armband, whatever you like, use FB and open it up in a second window.